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Q: Fachverband Quantenoptik und Photonik
Q 59: Poster IV
Q 59.59: Poster
Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof
Insights into the photophysics of the SnV center in diamond — •Philipp Fuchs1, Johannes Görlitz1, Michael Kieschnick2, Jan Meijer2, and Christoph Becher1 — 1Universität des Saarlandes, Fachrichtung Physik, Campus E2.6, 66123 Saarbrücken, Germany — 2Universität Leipzig, Angewandte Quantensysteme, Linnéstraße 5, 04103 Leipzig, Germany
The negatively charged tin vacancy center (SnV−) in diamond has been shown to be a versatile system that can be used as a quantum sensor, long-lived qubit, and single photon source. However, exploiting these properties requires active stabilization of the charge state, as the SnV− can be easily ionized to its double negative charge state (SnV2−) upon laser illumination, which is optically inactive [1].
In this work, we propose a simple rate equation model that includes this ionization process. We apply the model to an extensive set of measurements on different SnV centers, along with a thorough characterization of the efficiency of our measurement setup. We conclude that a charge-stabilized SnV− center is a nearly ideal single photon source in terms of quantum efficiency, since we can describe any reduced photon rate by ionization to the optically inactive SnV2− charge state without assuming other non-radiative decay channels.
[1] J. Görlitz et al., npj Quantum Inf 8, 45 (2022)